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        <h2>
          <span class="refentrytitle">signum</span>
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        <p>signum — 
      Performs a signum function.
    </p>
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      <div class="refsect1">
        <a id="idp147251584"></a>
        <h2>Description</h2>
        <p>
      Returns the signum of <span class="emphasis"><em>x</em></span> returning -1, 0 or 1.
    </p>
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      <div class="refsect1">
        <a id="idp147314544"></a>
        <h2>Syntax</h2>
        <pre class="synopsis"><span class="command"><strong>signum</strong></span>(x) (no rate restriction)</pre>
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      <div class="refsect1">
        <a id="idp147316608"></a>
        <h2>Examples</h2>
        <p>
      Here is an example of the signum opcode. It uses the file <a class="ulink" href="examples/signum.csd" target="_top"><em class="citetitle">signum.csd</em></a>.
      </p>
        <div class="example">
          <a id="idp147318384"></a>
          <p class="title">
            <strong>Example 818. Example of the signum opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on usingg command line flags.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac     <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc    ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o oscil.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="ohdr">sr</span>     <span class="op">=</span>    44100
<span class="ohdr">kr</span>     <span class="op">=</span>    4410
<span class="ohdr">ksmps</span>  <span class="op">=</span>    10
<span class="ohdr">nchnls</span> <span class="op">=</span>    2
<span class="ohdr">0dbfs</span>  <span class="op">=</span>    1

gaArr[]  <span class="opc">init</span>  2

<span class="oblock">instr</span> 1
kEnv <span class="opc">transeg</span>    1, p3, <span class="op">-</span>3, 0

a_pi <span class="op">=</span> 4 <span class="op">*</span> <span class="opc">taninv</span>(1.0)<span class="comment">;</span>
a1   <span class="opc">phasor</span> 440<span class="comment">;</span>
a2   <span class="op">=</span> <span class="opc">sin</span>(2 <span class="op">*</span> a_pi <span class="op">*</span> 1<span class="op">/</span><span class="ohdr">ksmps</span> <span class="op">*</span> a1)<span class="comment">;</span>
a3   <span class="opc">dcblock2</span> a2
asig <span class="op">=</span> <span class="opc">signum</span>(a3)

gaArr[0] <span class="op">=</span> a2   <span class="op">*</span> 0.6 <span class="op">*</span> kEnv 
gaArr[1] <span class="op">=</span> asig <span class="op">*</span> 0.6 <span class="op">*</span> kEnv 

<span class="opc">outs</span>  gaArr[0], gaArr[1]
<span class="oblock">endin</span>

<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>
<span class="stamnt">i</span> 1 0 3

<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
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        <p><br class="example-break" />
    </p>
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      <div class="refsect1">
        <a id="idp147322672"></a>
        <h2>Credits</h2>
        <p>
      </p>
        <table border="0" summary="Simple list" class="simplelist">
          <tr>
            <td>Author: John ffitch</td>
          </tr>
          <tr>
            <td>University of Bath, Codemist Ltd.</td>
          </tr>
          <tr>
            <td>Bath, UK</td>
          </tr>
          <tr>
            <td>July 2013</td>
          </tr>
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        <p>
    </p>
        <p>New in Csound version 6.01</p>
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